<!doctype html>
<html>
<head>
    <meta charset="utf-8"/>
    <title>Web Speech API</title>
    <style>
        body {
            padding: 15px 5px;
            text-align: center;
        }

        li {
            list-style-type: none;
        }

        #btn {
            width: 150px;
            height: 50px;
            margin-bottom: 20px;
        }
    </style>
</head>
<body>
<h3>Web Speech API</h3>
<button id="btn">开始</button>
<div id="content"></div>
<script src="app.js"></script>
</body>
</html>